parabolic(R,S)
i1 : parabolic(rootSystemA(5),set{1,2}) o1 = set {1, 2} o1 : Parabolic
The source of this document is in /build/reproducible-path/macaulay2-1.25.06+ds/M2/Macaulay2/packages/WeylGroups.m2:3358:0.